Interface unit for hearing aids



FIG. 1 is a side view of an interface unit of my design;

FIG. 2 is another side view of the interface unit of my design;

FIG. 3 is a perspective view of the interface unit of my design;

FIG. 4 is another perspective view of the interface unit of my design;

FIG. 5 is another perspective view of the interface unit of my design;

FIG. 6 is another perspective view of the interface unit of my design;

FIG. 7 is another perspective view of the interface unit of my design;and,

FIG. 8 is another perspective view of the interface unit of my design.

CLAIM The ornamental design for an interface unit for hearing aids, asshown and described.